JP6959102B2 - Branch connector for termination and communication network - Google Patents

Description

The present invention relates to a terminal branch connector connected to the ends of two electric wires constituting a twisted pair wire, and a communication network using the same.

When the two wires constituting the twisted pair wire are used as the trunk line of the communication circuit, a terminating resistor is attached to the end of the wire (trunk line) to prevent the reflected wave of the signal (see Patent Documents 1 and 2). ). In the past, the end coating of the electric wire (main line) was peeled off and a terminating resistor was attached.

Japanese Unexamined Patent Publication No. 2014-141140 Japanese Unexamined Patent Publication No. 2002-151169

However, in the above-mentioned conventional example, since it is necessary to perform the terminating resistor mounting work while maintaining the twisted shape of the two electric wires, there is a risk that the communication quality cannot be maintained and there is a problem that the terminating resistor mounting workability is poor. there were.

Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a terminating branch connector having good terminating workability and a communication network using the same.

In the present invention, the two electric wires constituting the twisted pair wire are connected to the ground wire and the first housing having the arrangement path portion in which the two electric wires maintain the twisted shape and the distance between the two electric wires is widened. The terminating pressure welding terminal with the terminating resistor is fixed, and when assembled to the first housing, the terminating pressure welding terminal is provided with a second housing portion for pressure welding connection to two electric wires. It is a branch connector for termination.

According to the present invention, although the distance between the two electric wires can be widened, the twisted shape is maintained and the arrangement is made, so that the terminating resistor can be attached while maintaining the communication quality. Further, since the terminating resistor can be attached by attaching the second housing portion to the first housing portion, the terminating workability of the terminating resistor is good.

It is an exploded perspective view of the branch connector for termination which shows 1st Embodiment of this invention. The first embodiment of the present invention is shown, and it is the whole perspective view of the branch connector for termination. The first embodiment of the present invention is shown, (a) is a sectional view taken along line A1-A1 in FIG. 2, (b) is a sectional view taken along line A2-A2 in FIG. 2, and (c) is a sectional view taken along line BB in FIG. It is a figure. The first embodiment of the present invention is shown, (a) is a perspective view of the inner surface side of the first housing portion, and (b) is a cross-sectional view of the terminal fixing housing portion along the CC line of FIG. .. The first embodiment of the present invention is shown, in which (a) is a perspective view of the inner surface side of the united housing portion of the second housing, and (b) is a view of the outer surface side of the combined housing portion of the second housing portion. It is a perspective view. It is a top view which shows the 1st Embodiment of this invention, and is the state in which two 1st electric wires are arranged in the 1st housing part. It is a perspective view which shows the 1st Embodiment of this invention, and shows the state before the 1st housing part is combined with the housing part for uniting. It is a perspective view which shows the 1st Embodiment of this invention, and shows the state before fitting the terminal fixing housing part with the uniting housing part. It is sectional drawing which shows 1st Embodiment of this invention, and shows the state before fitting the terminal fixing housing part with the uniting housing part. It shows the 1st Embodiment of this invention and is the block diagram of the communication network. A second embodiment of the present invention is shown, and is an overall perspective view of a branch connector for termination. It is sectional drawing which shows the 2nd Embodiment of this invention, and shows the state before fitting the 1st housing part with the 2nd housing part along the line EE of FIG. 2 is a cross-sectional view showing a second embodiment of the present invention, showing a state in which the first housing portion is fitted to the second housing portion along the line EE of FIG. A first modification of the first embodiment of the present invention is shown, and is a perspective view of a branch connector for termination. A second modification of the first embodiment of the present invention is shown, and is a schematic perspective view of a branch connector for termination. It is a main part plan view of the termination pressure welding terminal which concerns on a modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment)
1 to 10 show a first embodiment of the present invention. As shown in FIG. 10, the communication network 1 is mounted on the vehicle. The communication network 1 includes a trunk line w1, a plurality of branch lines w2 branched at a plurality of points of the trunk line w1, a plurality of ECUs (electronic control units) 2 connected to each branch line w2, and both ends of the trunk line w1. It includes two terminating resistance units 3 connected to each other. Each ECU 2 is equipped with a CAN interface (not shown). Each ECU 2 transmits and receives signals by CAN communication (controller area network).

As the trunk line w1, two first electric wires W1 constituting a twisted pair wire are used. The two first electric wires W1 are arranged in a twisted shape in which they are in close contact with each other. As the branch line w2, two second electric wires W2 that also form a twisted pair wire are used. The two second electric wires W2 are arranged in a twisted shape in which they are in close contact with each other. The terminating resistor portion 3 is composed of a terminating branch connector 5C. Hereinafter, the terminal branch connector 5C will be described.

As shown in FIGS. 1 to 5, the termination branch connector 5C has a first housing portion 10 arranged so that two first electric wires (electric wires) W1 constituting the twisted pair wire pass through, and a ground wire W3. It is provided with a second housing portion 20 to which a single terminal pressure welding terminal 60 to which is connected is fixed.

The first housing portion 10 has a substantially rectangular plate shape. The first housing portion 10 has a distribution path portion 11. The arrangement path portion 11 has a twist groove 12 and three ribs 13a and 13b erected at intervals in the arrangement direction of the first electric wire W1. The twist groove 12 is formed in a groove having a shape in which two first electric wires W1 follow a twist shape in which the two first electric wires W1 are spaced apart from each other. The ribs 13a and 13b at the three locations are arranged at intervals of substantially the twist pitch P of the two first electric wires W1.

The central rib 13a has a diamond shape when viewed from above. The central position where both side surfaces of the central rib 13a are most separated from each other is the pressure welding position of the pair of pressure welding terminals 50 described below. The ribs 13b on both sides are isosceles triangular when viewed from above.

In the arrangement path portion 11, the three ribs 13a and 13b interrupt each other between the two first electric wires W1, so that the two first electric wires W1 open a distance from each other while maintaining the twisted shape. It has a twist shape and is arranged in the twist groove 12. The two first electric wires W1 arranged in the twist groove 12 are drawn out from both ends of the twist groove 12 to the outside of the first housing portion 10, respectively. The twist pitch of the two first electric wires W1 in the arrangement route portion 11 is substantially the same as the twist pitch P of the two first electric wires W1 other than the arrangement route portion 11.

The arrangement path portion 11 is provided with a pair of pressure welding blade guide grooves 14 continuous from the top surface of the central rib 13a to the bottom surface of each twist groove 12. Each pressure welding blade guide groove 14 is formed to have a width dimension substantially the same as the wall thickness of the pressure welding blade 52 or a slightly wider dimension.

A pair of locking claws 15 are projected on both side surfaces of the first housing portion 10.

The second housing portion 20 is a separate body from the union housing portion 21 assembled to the first housing portion 10 and the union housing portion 21, and is for terminal fixing to which a single terminal pressure welding terminal 60 is fixed. It includes a housing portion 31C.

The united housing portion 21 has an upper surface wall 22 formed to have a size slightly larger than that of the first housing portion 10, and four side walls 23a and 23b suspended from the entire peripheral edge of the upper surface wall 22. On the inner surface of the upper surface wall 22, a protruding wall 24 having a shape that follows the shape of the twist groove 12 (a shape in which the two first electric wires W1 follow the twist shape in which the distance between the two first electric wires W1 is widened) is provided. The protruding wall 24 enters the twist groove 12 in a state of being assembled to the first housing portion 10. A positioning recess 24a is provided inside the upper surface wall 22 by being surrounded by a protruding wall 24. A pair of positioning holes 22a are formed at both ends of the upper surface wall 22. A pair of pressure welding blade entry holes 25 are formed in the upper surface wall 22.

The four side walls 23a and 23b are arranged at positions that cover the entire side surface of the first housing portion 10 in a state of being assembled to the first housing portion 10. A pair of electric wire insertion grooves 26 are formed in each of the pair of side walls 23a orthogonal to the arrangement direction of the first electric wire W1. Ribs 27 are provided between the pair of electric wire insertion grooves 26 on both side walls 23a. Each rib 27 is inserted between the two first electric wires W1 together with the ribs 13b at both ends of the first housing portion 10 in a state of being assembled to the first housing portion 10.

A pair of elastic locking frames 28 are provided on the pair of side walls 23b extending along the same direction as the arrangement direction of the first electric wire W1. By locking the pair of elastic locking frames 28 to the locking claws 15 of the first housing portion 10, the combined housing portion 21 of the first housing portion 10 and the second housing portion 20 is assembled.

The uniting housing portion 21 has a connector fitting portion 29 on the upper surface of the upper surface wall 22. A pair of pressure welding blade entry holes 25 are opened inside the connector fitting portion 29. A pair of elastic locking frames 30 are provided on the fitting inlet side of the connector fitting portion 29. The terminal fixing housing portion 31C is fitted into the connector fitting portion 29.

The terminal fixing housing portion 31C has two split connector housing portions 32A and 32B. A pair of locking claws 39a are provided on the front side of the split connector housing portion 32A. The two split connector housing portions 32A and 32B have an elastic locking frame 40 on one side and a locking claw 41 on the other side. The two split connector housing portions 32A and 32B are united with each other by engaging a locking claw (not shown) with the elastic locking frame 40. The terminal accommodating chamber 35A and the electric wire lead-out passage 35a are formed inside by combining the split connector housing portions 32A and 32B.

As shown in FIGS. 3A and 4B, the split connector housing portions 32A and 32B are provided with a positioning convex portion 32c and a positioning concave portion 32d of the termination pressure welding terminal 60 arranged in the terminal accommodating chamber 35A. Has been done. The electric wire lead-out passage 35a is formed in a passage bent by a concave portion 32e of the split connector housing portion 32A and a convex portion 32f of the split connector housing 3 portion 2B.

The termination pressure welding terminal 60 is arranged in the terminal accommodating chamber 35A. The terminating pressure welding terminal 60 includes a single pressure welding blade 61 for pressure welding connecting the ground wire W3, a pair of pressure welding blades 62 for pressure welding connection to the two first electric wires W1, and two terminating resistors 63. It has a capacitor 64. That is, a terminating resistor 63 is integrally attached to the terminating pressure welding terminal 60. The terminating resistor 63 is a chip resistor.

The termination pressure welding terminal 60 is provided with press fitting holes 65 at a plurality of locations. The boss portion 32g of the split connector housing portion 32A is press-fitted into the press-fitting hole 65. The termination press-welding terminal 60 is arranged in a state of being positioned in the terminal accommodating chamber 35A by press-fitting the boss portion 32 g of the press-fitting hole 65.

The pair of pressure welding blades 62 of the termination pressure welding terminal 60 project to the outside. The ground wire W3 connected to the terminal pressure welding terminal 60 is drawn out from the side opposite to the pressure welding blade 62 through the electric wire lead-out passage 35a.

Next, the procedure for assembling the terminal branch connector 5C will be described. The vicinity of one end of the two first electric wires W1 forming the twisted pair wire (near the end of the trunk wire) is inserted into the twist groove 12 of the first housing portion 10. The twist groove 12 can be easily inserted by inserting the ribs 13a and 13b into the three positions between the two first electric wires W1. As shown in FIG. 6, the two first electric wires W1 inserted into the twist groove 12 are arranged in a twist shape in which the distance between them is widened.

Next, as shown in FIG. 7, the first housing portion 10 is combined with the uniting housing portion 21 of the second housing portion 20. That is, the first housing portion 10 is covered with the union housing portion 21 of the second housing portion 20, and the elastic locking frame 30 of the union housing portion 21 is locked to the locking claw 15 of the first housing portion 10. As a result, the protruding wall 24 of the uniting housing portion 21 enters the twist groove 12 of the first housing portion 10, and each first electric wire W1 is positioned in the twist groove 12.

Further, the tip end side of the central rib 13a enters the positioning recess 24a of the housing portion 21 for coalescence. The pair of ribs 13b at both ends fit into the pair of positioning recesses 24a of the uniting housing portion 21. As a result, the first housing portion 10, the uniting housing portion 21, and the second housing portion 20 are united in the positioned state.

Before or after the union work of the first housing portion 10 and the union housing portion 21 of the second housing portion 20, the work of connecting the termination pressure welding terminal 60 to the ground wire W3 and the work of connecting the second housing portion 20 The work of assembling the terminal pressure welding terminal 60 to the terminal fixing housing portion 31C is performed.

The work of connecting the termination pressure welding terminal 60 to the ground wire W3 is completed by pressure welding the terminal portion of the ground wire W3 to the pressure welding blade 61 of the termination pressure welding terminal 60.

In the work of assembling the terminal pressure welding terminal 60 to the terminal fixing housing portion 31C, each boss portion 32g of the split connector housing portion 32A is press-fitted into the press-fitting hole 65 of the terminal pressure welding terminal 60 (FIG. 3 (a), FIG. 9). With this, the termination pressure welding terminal 60 is fixed to the split connector housing portion 32A. Next, as shown in FIG. 4B, the process is completed by arranging the ground wire W3 in the wire lead-out passage 35a and combining the split connector housing portions 32A and 32B.

Next, as shown in FIGS. 8 and 9, the terminal fixing housing portion 31C is fitted into the connector fitting portion 29 of the uniting housing portion 21. That is, the terminal fixing housing portion 31C is inserted into the connector fitting portion 29 of the uniting housing portion 21, and the elastic locking frame 30 of the connector fitting portion 29 is engaged with the locking claw 39a of the terminal fixing housing portion 31C. Stop. In this fitting process, the pair of pressure welding blades 62 of the termination pressure welding terminals 60 enter the twist groove 12 while being guided by the pressure welding blade guide groove 14. In the mating completed state, each pressure welding blade 62 of the termination pressure welding terminal 60 is pressure welding connected to each first electric wire W1.

Similarly, the termination branch connector 5C is attached to the other end of the two first electric wires W1 forming the twisted pair wire (the end of the trunk line w1).

As described above, the termination branch connector 5C is a first housing portion having a distribution path portion 11 in which two first electric wires W1 constituting the twisted pair wire are arranged in a twisted shape in which the distance between the two first wires W1 is widened. 10 and the termination pressure welding terminal 60 with a terminating resistor 63 connected to the ground wire W3 are fixed, and when assembled to the first housing portion 10, the termination pressure welding terminal 60 is the two first electric wires W1. It is provided with a second housing portion 20 that is pressure-welded to and connected to.

Therefore, although the distance between the two first electric wires W1 is widened, the twisted shape is maintained and the arrangement is made, so that the terminating resistor 63 can be attached while maintaining the communication quality. Further, if the second housing portion 20 is attached to the first housing portion 10, the terminating resistor 63 can be attached, so that the terminating workability of the terminating resistor 63 is good.

The arrangement path portion 11 has ribs 13a and 13b that cut in between the two first electric wires W1. Therefore, the distance between the two first electric wires W1 can be easily increased.

The uniting housing portion 21 of the second housing portion 20 has a protruding wall 24 that enters the twist groove 12 in a state of being assembled to the first housing portion 10. Therefore, the first electric wire W1 can be reliably positioned in the twist groove 12, which contributes to maintaining the communication quality. In particular, in this embodiment, the protruding wall 24 has a shape that follows the shape of the twisted groove 12 (a shape that the two first electric wires W1 follow the twisted shape in which the distance between the two first electric wires W1 is widened). Reliable positioning is possible over a range.

The second housing portion 20 is assembled to the first housing portion 10, and the united housing portion 21 having the connector fitting portion 29 and the pair of pressure welding terminals 50 are fixed and fitted to the connector fitting portion 29. It is provided with a terminal fixing housing portion 31C.

Therefore, the terminating resistor 63 can be attached by the same operation as the connection between the male and female connector of the terminating branch connector 5C. The work of assembling the first housing part 10 and the uniting housing part 21 to the trunk line w1 (work on the trunk line w1 side) and the fitting work of fitting the terminal fixing housing part 31 connected to the branch line w2 into the uniting housing part 21. Since the work (the work of connecting the branch line w2 to the main line w1) can be performed separately, the degree of freedom of work is improved.

In the two first electric wires W1 constituting the twisted pair wire, ribs 13a and 13b are interposed between the first electric wires W1 at three places, and the pressure welding blade 52 is pressure-welded and connected at the position of the rib 13a in the center thereof. .. Therefore, even if the tensile force of the two first electric wires W1 acts on the branch connector 5A, the tensile force of the first electric wire W1 does not directly act on the pressure welding connection portion by the pressure welding blade 52, so that the reliability of the pressure welding connection is high. ..

The communication network 1 is located between two first electric wires W1 forming a twisted pair wire, two second electric wires W2 forming a twisted pair wire, two first electric wires W1 and two second electric wires W2. The terminal branch connector 5C having the above-described configuration is provided for connecting the above. Therefore, in the termination branch connector 5C, the distance between the two first electric wires W1 can be widened, but the twist shape is maintained even in the termination branch connector 5C. From the above, the communication network 1 in which the twisted pair line is branched while maintaining the communication quality can be obtained.

(Second Embodiment)
11 to 13 show a second embodiment of the present invention. The communication network 1 has the same configuration as that of the first embodiment (see FIG. 10). In this communication network 1, a terminal branch connector (branch connection structure) 5D is used for branching the twisted pair line.

The termination branch connector 5D of the second embodiment is different from that of the first embodiment in that the second housing portion 20 is formed of a single housing.

That is, in the second housing portion 20, the united housing portion 21 assembled to the first housing portion 10 and the terminal fixing housing portion 31C to which the pair of pressure contact terminals 50 are fixed are integrally formed. Since it is integrally formed in this way, a locking claw and an elastic locking frame for locking between the uniting housing portion 21 and the terminal fixing housing portion 31C are not provided.

Since the other configurations are the same as those in the first embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted.

Next, the procedure for assembling the terminal branch connector 5D will be described. One end (the end of the trunk line) of the two first electric wires W1 constituting the twisted pair wire is inserted into the twist groove 12 of the first housing portion 10 as described in the first embodiment.

Next, the work of connecting the termination pressure welding terminal 60 to the ground wire W3 and the work of assembling the termination pressure welding terminal 60 to the terminal fixing housing portion 31C of the second housing portion 20 as described in the first embodiment. I do.

Next, the uniting housing portion 21 of the second housing portion 20 is combined with the first housing portion 10 in the manner described in the first embodiment. As a result, the protruding wall 24 of the uniting housing portion 21 enters the twist groove 12 of the first housing portion 10, and each first electric wire W1 is positioned in the twist groove 12.

In this coalescence process, each pressure welding blade 62 of the termination pressure welding terminal 60 enters each twist groove 12 while being guided by the pressure welding blade guide groove 14. In the mating completed state, each pressure welding blade 62 of the termination pressure welding terminal 60 is pressure welding connected to each first electric wire W1.

Even in the termination branch connector 5D of the second embodiment, the distance between the two first electric wires W1 can be widened in the termination branch connector 5D for the same reason as in the first embodiment, but the twisted shape. Since the arrangement is carried out while maintaining the above, there is an effect that the terminating resistor 63 can be attached while maintaining the communication quality.

The second housing portion 20 is united because the uniting housing portion 21 assembled to the first housing portion 10 and the terminal fixing housing portion 31C to which the terminal pressure welding terminal 60 is fixed are integrally formed. Since it is not necessary to perform the fitting work between the housing portion 21 for fixing and the housing portion 31C for fixing the terminals, the workability of assembling the terminal branch connector 5D is better than that of the first embodiment. Further, the termination branch connector 5D of the second embodiment has a reduced number of parts, a lighter weight, and the like as compared with the first embodiment.

The communication network 1 includes a terminal branch connector 5D having the above configuration for connecting between the two first electric wires W1 and the ground wire W3. Therefore, for the same reason as in the first embodiment, the communication network 1 in which the twisted pair line is branched while maintaining the communication quality can be obtained.

(First Modified Example of First Embodiment)
FIG. 14 shows a first modification of the first embodiment. The terminal branch connector 5C of the first modification has a different configuration of the terminal fixing housing portion 31A as compared with the first embodiment. That is, the terminal fixing housing portion 31A of the first modification is configured to pull out the second electric wire W2 in a direction orthogonal to the fitting direction of the connector fitting portion 29. In this first modification, when the arrangement path of the ground wire W3 is in the parallel direction of the first electric wire W1, the earth wire W3 can be smoothly pulled out in the desired arrangement direction.

Other configurations are the same as those in the first embodiment. The same components as those in the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

This first modification can also be applied to the termination branch connector 5B of the second embodiment.

(Second modification of the first embodiment)
FIG. 15 shows a second modification of the first embodiment. The termination branch connector 5C of the second modification is provided with a fastening band 43 in the housing portion 21 for coalescence, as compared with the first embodiment. The termination branch connector 5C can be fixed to the electric wire (main line) W of the wire harness by the fastening band 43. The termination branch connector 5C can also be fixed to a member other than the electric wire (main line) W.

Other configurations are the same as those in the first embodiment. The same components as those in the first embodiment are designated by the same reference numerals in the drawings, and the description thereof will be omitted.

This second modification can also be applied to the termination branch connector 5B of the second embodiment.

(Other variants)
In each embodiment, the terminating resistor 63 is integrally attached to the termination pressure welding terminal 60, but it may be attached separately.

In each embodiment, the terminating resistor 63 is a chip resistor, but as shown in FIG. 16, the terminating resistor 63 may be formed by thinning a part of the terminating pressure welding terminal 60. That is, it may be formed by using a part of the termination pressure welding terminal 60.

In each embodiment, the two first electric wires W1 constituting the twisted pair wire are configured such that ribs 13a and 13b are interposed at three positions, but the number of ribs may be one, two, or four or more. good.

In each embodiment, the arrangement path portion 11 is formed by the twist groove 12 and the ribs 13a and 13b, but the arrangement is such that the two first electric wires W1 can be arranged in a twist shape in which the distance between the two first electric wires W1 is widened. Just do it. For example, the arrangement path portion 11 may have a configuration of only the twist groove 12, or may have a configuration of only the rib 13a.

In each embodiment, the arrangement path portion 11 has a twist groove 12, but a pair of side walls following a twisted shape in which two first electric wires W1 are spaced apart from each other are erected in the first housing portion 10. May be formed. The pair of side walls may be intermittent side walls instead of continuous side walls.

In each embodiment, the protruding wall 24 has a shape that follows the shape of the twist groove 12 (a shape in which the two first electric wires W1 follow the twist shape in which the distance between the two first electric wires W1 is widened), but the shape is intermittently formed in the twist groove 12. It may be a plurality of protruding walls to be inserted.

1 Communication network W1 1st electric wire W2 2nd electric wire 5C, 5D Termination branch connector 10 1st housing part 11 Arrangement path part 12 Twist groove 13a, 13b Rib 20 2nd housing part 21 Combined housing part 24 Protrusion wall 29 Connector Fitting part 31C, 31A Terminal fixing housing part 60 Termination pressure welding terminal 62 Pressure welding blade 63 Termination resistance

Claims (7)

A first housing portion having a distribution path portion in which two electric wires constituting a twisted pair wire are arranged in a twisted shape in which the distance between them is widened, and a first housing portion.
When the terminating pressure welding terminal with a terminating resistor connected to the ground wire is fixed and assembled to the first housing portion, the terminating pressure welding terminal is pressure-welded to the two electric wires. A branch connector for termination, which is characterized by being equipped with. The termination branch connector according to claim 1.
The branching connector for termination is characterized in that the arrangement path portion has a twist groove that follows the outer contour of a twist shape. The terminal branch connector according to claim 1 or 2.
The branch connector for termination, wherein the distribution path portion has a rib that cuts in between the two electric wires. The termination branch connector according to claim 2.
The second housing portion is a terminal branch connector having a protruding wall that enters the twist groove in a state of being assembled to the first housing portion. The terminal branch connector according to any one of claims 1 to 4.
The second housing portion is assembled to the first housing portion, and the united housing portion having the connector fitting portion and the two pressure welding terminals are fixed and the terminal fixing is fitted to the connector fitting portion. A branch connector for termination, which is characterized by having a housing for use. The terminal branch connector according to claim 1 to 4.
The second housing portion is characterized in that a united housing portion assembled to the first housing portion and a terminal fixing housing portion to which the two pressure welding terminals are fixed are integrally formed. Branch connector for termination. The two first wires that make up the twisted pair wire,
Two second electric wires that are branched and connected to the two first electric wires to form a twisted pair wire, and a position that is an end of a trunk line among the two first electric wires and the two second electric wires. A communication network including the termination branch connector according to claim 1 to 6, which is connected to the above.

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